Went from 4.10's to 3.55 first time to track since swap NEW PB

[watman02]

ive been times that are in sig but was going 31 spline so i though i would put 3.55's back in and see what happend.
i really thought i would have MPH faster?? not slower? what ever tune is the same and temps are almost identical and at same track. i went another 11.9 and a 11.88 @ 118 previous was 11.9 @ 120.66? both were 1.7xx 60's?

r/t .195
60' 1.723
330 5.033
1/8th 7.756 @ 91.38mph
1000 ft 10.060
1/4 11.997 @ 116.66


https://www.youtube.com/watch?v=H_A7wPJ_65g
r/t .108
60' 1.770
330 5.024
1/8th 7.697 @93mph
1000 9.965
1/4 11.882 @117.96mph
https://www.youtube.com/watch?v=rIAcWQguKUE

 

[LS2GTO]

i really thought i would have MPH faster??

If you're not running out of gear with the 4.11s then there's no reason to believe that going down in gears numerically will net you a higher trap speed. Higher gearing, more torque multiplication, faster acceleration so usually higher trap speed also.

What gear were you when crossing the traps with the 4.11s vs now?

 

[watman02]

4th both times. The 4.10's on the street were getting old. And i had the parts and was in there anyways so i thought I would give it a try. Also looking at the time slips of the 11.9 passes with and without 4.10's and similar 60' i was a touch quicker in the 1/8th ans still at 1000 ft but same at end so it is 4th gear where it starts falling off.